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- 425 vs NU31
BioLite 425 vs Nitecore NU31
What 425 does better (1) and where NU31 wins (3) — every spec side by side.
Why is 425 better than NU31?
- Weight78 g vs 96 g+23%
Why is NU31 better than 425?
- Maximum runtime60 h vs 147 h2.4×
- Maximum output425 lm vs 550 lm+29%
- Water protection (IPx)IPx4 vs IPx6+50%
Specifications
Side by side
| Light output | ||
| Maximum output | 425 lm | 550 lm |
| Peak beam intensity | — | 5,260 cd |
| Beam distance (ANSI FL1) | — | 145 m |
| Light source | LED | LED |
| LED & beam | ||
| Number of LEDs | — | 4 |
| Battery & charging | ||
| Battery capacity | — | 1,800 mAh |
| Maximum runtime | 60 h | 147 h |
| Rechargeable | — | Yes |
| USB-C charging | Yes | Yes |
| Battery level indicator | Yes | Yes |
| Build & durability | ||
| Protection rating | — | IP66 |
| Water protection (IPx) | IPx4 | IPx6 |
| Submersible to | — | 2 m |
| Body material | Plastic / polymer | Aluminium |
| Size & weight | ||
| Head diameter / width | — | 130 mm |
| Weight | 78 g | 96 g |
| Modes & features | ||
| Strobe | — | Yes |
| SOS / beacon | — | Yes |
| Red light | — | Yes |
| Lockout | — | Yes |
